The heart pendant is 10k yellow gold with channel set baguette cut genuine diamonds. There are 21 diamonds ranging from .03 to .05 ct. There is rhodium plating to the channels for a two toned look. The heart measures 3/4" by 3/4" not including the bail loop it is marked 10k on the back. The heart weighs 2.3 grams 10k. The chain is a sturdy box chain in 14k yellow gold, it is 16" and weighs 1.7 grams.